How do change the Headlight Switch in a !993 GMC Sierra 1500?

I have a 1993 GMC Sierra Single cab and it takes me about 15 minutes to get my panel lights to work. The headlights turn on just fine but they mph and rpms do not light up? If i went to Autozone and picked up a new switch how would i go about replacing it?How do change the Headlight Switch in a !993 GMC Sierra 1500?Take the screws out of the plastic panel that goes around the light switch, speedometer etc in front of the driver. The switch is mounted on the back of that panel.............md

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